DE545858C - Current collection brush, in particular current collection roller, made of resistance material for electrical control apparatus - Google Patents
Current collection brush, in particular current collection roller, made of resistance material for electrical control apparatusInfo
- Publication number
- DE545858C DE545858C DEK120757D DEK0120757D DE545858C DE 545858 C DE545858 C DE 545858C DE K120757 D DEK120757 D DE K120757D DE K0120757 D DEK0120757 D DE K0120757D DE 545858 C DE545858 C DE 545858C
- Authority
- DE
- Germany
- Prior art keywords
- current collection
- electrical control
- brush
- resistance
- resistance material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
- H01C10/26—Adjustable resistors resistive element moving
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Description
Stromabnahmebürste, insbesondere Stromabnahmerolle, aus Widerstandswerkstoff für elektrische Regelapparate Es ist bereits eine Abnahmebürste, insbe# sondere eine Kohlerolle, aus Widerstandswerkstoff für elektrische Regelapparate bekannt geworden, die auf Kontakten bzw. blankgemachten Windungen von Widerständen oder Transformatorwicklungen schleift. Sie hat gegenüber den rein metallenen Abnahmebürsten den Vorteil, daß der Widerstandswerkstoff bei Überbrücken zweier benachbarter Kontakte bzw. Windungen selbsttätig eingeschaltet wird und dadurch den bei Metallbürsten vorhandenen Kurzschluß zweier benachbarter Kontakte bzw. Windungen durch Zwischenschalten des Widerstandes verhindert. Um den Kurzschlußstrom zu begrenzen, muß der Werkstoff der Bürsten einen bestimmten Widerstand besitzen. Die Größenabmessungen der Bürsten sind -nun so, daß die Höhe der Bürste oder der Radius der Rolle erheblich größer ist als die Abmessung zwischen zwei über den Widerstand verbundene Kontakte oder Windungen. Aus diesem Grunde ergibt sich, daß der Abnahmestrom einen erheblich größeren Weg durch den Widerstandswerkstoff macht als der Kurzschlußstrom. Nun ist meistens der Abnahmestrom erheblich größer als der Kurzschlußstrom, so daß hierdurch eine starke Erwärmung der Abnahmebürste eintritt.Current collection brush, in particular current collection roller, made of resistance material for electrical control devices There is already an acceptance brush, especially one a carbon roller, known from resistance material for electrical control apparatus become that on contacts or bare turns of resistors or Transformer windings grinds. It has opposite the purely metal pick-up brushes the advantage that the resistance material when bridging two adjacent contacts or turns is switched on automatically and thus the case of metal brushes existing short-circuit between two adjacent contacts or windings by switching between them of resistance prevented. In order to limit the short-circuit current, the material must the brushes have a certain resistance. The size dimensions of the brushes are now so that the height of the brush or the radius of the roller is considerably larger is as the dimension between two contacts connected via the resistor or Turns. For this reason it follows that the take-off current is considerably larger Makes way through the resistance material as the short-circuit current. Well is mostly the take-off current is significantly greater than the short-circuit current, so that a strong heating of the pick-up brush occurs.
Diese geschilderten Nachteile will die Erfindung dadurch vermeiden, daß der Abnahmestromweg über Werkstoffe führt, die einen abgestuften Widerstand besitzen, und der Überbrückungsstromweg allein durch den Werkstoff von höchstem Widerstand gebildet wird. Die Abstufung der Widerstandswerkstoffe erfolgt durch der Kohle beigemischte oder mit ihr mechanisch verbundene Graphite oder Metalle.The invention aims to avoid these disadvantages outlined by that the acceptance current path leads through materials that have a graduated resistance own, and the bridging current path through the material alone of the highest Resistance is formed. The resistance materials are graded through graphites or metals added to the coal or mechanically connected to it.
In den Abbildungen sind Ausführungsbeispiele gemäß der Erfindung dargestellt. Nach Abb. i besteht die Schleifbürste aus einem Werkstoff i i von höchstem Widerstand, beispielsweise reiner Kohle, einem Widerstandswerkstoff 1:2, aus einer mit Metall oder Graphit vermischten Kohle und einem Werkstoff 13 aus reinem Metall. Die Abb. 2 zeigt als Ordinate aufgetragen die Länge der Abnahmebürste und als Abszisse den Widerstandswert R. An den Übergängen des Abnahmestromweges von einem Werkstoff zum anderen entsteht in der Kurve ein Knick.In the figures, exemplary embodiments according to the invention are shown. According to Fig. I, the grinding brush consists of a material i i of the highest resistance, for example pure carbon, a resistance material 1: 2, made of a metal or graphite mixed carbon and a material 13 made of pure metal. Fig. 2 shows the length of the removal brush plotted as the ordinate and the length as the abscissa Resistance value R. At the transitions of the acceptance current path from one material to the others have a kink in the curve.
Abb.3 zeigt eine Kohlerolle, die eine äußere Zone von höchstem Widerstand, beispielsweise reine Kohle i i, besitzt und von der ein allmählicher Übergang durch Zunahme eines Metall- oder Graphitzusatzes bis zum reinen Metall 13 erfolgt. Die in Abb. q. entsprechend Abb. 2 angegebene Kurve weist in diesem Fall keine Knicke auf, sondern zeigt einen allmählichen -Übergang des Widerstandes. Die Kohlerolle schleift in diesem Fall auf blankgemachten Windungen 1q., der Wicklung eines Regelapparates, beispielsweise eines Transformators.Fig. 3 shows a carbon roller, which has an outer zone of highest resistance, for example pure coal ii, and from which a gradual transition takes place through an increase in the addition of metal or graphite to pure metal 13 . The in Fig.q. In this case, the curve given in accordance with Fig. 2 shows no kinks, but rather shows a gradual transition of the resistance. In this case, the carbon roller grinds on bare turns 1q., The winding of a control device, for example a transformer.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK120757D DE545858C (en) | Current collection brush, in particular current collection roller, made of resistance material for electrical control apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK120757D DE545858C (en) | Current collection brush, in particular current collection roller, made of resistance material for electrical control apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
DE545858C true DE545858C (en) | 1932-03-05 |
Family
ID=7244665
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK120757D Expired DE545858C (en) | Current collection brush, in particular current collection roller, made of resistance material for electrical control apparatus |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE545858C (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE882112C (en) * | 1938-04-23 | 1953-07-06 | Siemens Ag | Current pick-up roller for step contact tracks |
DE965145C (en) * | 1939-06-11 | 1957-06-06 | Siemens Ag | Variable resistor with the pantograph directly touching the resistor body |
DE965828C (en) * | 1941-12-14 | 1957-06-19 | Siemens Ag | Electrical resistor made of conductive powder and synthetic resin |
DE1027765B (en) * | 1951-11-27 | 1958-04-10 | Iaelinia Ag Fuer Elek Sche Ind | Electrical resistance body |
DE1180836B (en) * | 1959-04-27 | 1964-11-05 | Dr Gerd Hinrichs | Heavy-duty regulating transformer with movable sliding or rolling contact |
DE10017511A1 (en) * | 2000-04-10 | 2001-12-13 | Sirona Dental Systems Gmbh | Variable resistance and voltage divider, circuit board and dental device |
-
0
- DE DEK120757D patent/DE545858C/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE882112C (en) * | 1938-04-23 | 1953-07-06 | Siemens Ag | Current pick-up roller for step contact tracks |
DE965145C (en) * | 1939-06-11 | 1957-06-06 | Siemens Ag | Variable resistor with the pantograph directly touching the resistor body |
DE965828C (en) * | 1941-12-14 | 1957-06-19 | Siemens Ag | Electrical resistor made of conductive powder and synthetic resin |
DE1027765B (en) * | 1951-11-27 | 1958-04-10 | Iaelinia Ag Fuer Elek Sche Ind | Electrical resistance body |
DE1180836B (en) * | 1959-04-27 | 1964-11-05 | Dr Gerd Hinrichs | Heavy-duty regulating transformer with movable sliding or rolling contact |
DE10017511A1 (en) * | 2000-04-10 | 2001-12-13 | Sirona Dental Systems Gmbh | Variable resistance and voltage divider, circuit board and dental device |
DE10017511C2 (en) * | 2000-04-10 | 2002-04-04 | Sirona Dental Systems Gmbh | Variable resistance and voltage divider, circuit board and dental device |
EP1154442A3 (en) * | 2000-04-10 | 2005-01-05 | Sirona Dental Systems GmbH | Variable resistor and voltage divider comprising the same, printed circuit and dentist tool |
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